Question

What was the prime cause of siraj ud daulah's ruin

Answer 1

Because of a very small mistake made by Siraj-Ud-Daula during the battle of plassey and here are its nitty-gritties. The initial foreign traders found their way to India inspired by India's magnificent wealth during the tenure of Jahangir. 

Answer 2

The prime cause of sirajuddaulah ruin is that his own cmmander in chief mir zafar betray him nd give support to british